File - In this Sept. 20, 2014, file photo, Calvin Harris arrives at the iHeart Radio Music Festival, at The MGM Grand Garden Arena in Las Vegas. Harris, who wrote and produced Rihanna’s hit “We Found Love,” is set to perform at the singer’s charity event Sept. 14, 2017. Rihanna said Wednesday, Aug. 16, 2017, that the Scottish DJ-producer will join fellow performer Kendrick Lamar and host Dave Chappelle for her third Diamond Ball. (Photo by Andrew Estey/Invision/AP, File)